#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <iostream>
#include <vector>

using namespace std;

struct ListNode {
    int val;
    ListNode* next;
    ListNode(int x) : val(x), next(NULL) {}
};

struct TreeNode {
    int val;
    TreeNode* left;
    TreeNode* right;
    TreeNode(int x) : val(x), left(NULL), right(NULL) {}
};

class Solution {
   public:
    int fib(int n) {
        int t[101];
        t[0] = 0;
        t[1] = 1;
        for (int i = 2; i < n + 1; i++) {
            t[i] = (t[i - 2] + t[i - 1]) % 1000000007;
        }
        return t[n];
    }
};

int main() {
    cout << "Hello, World!";
    int t = Solution().fib(10);
    return 0;
}